US2024241408A1PendingUtilityA1
Liquid crystal display panel and display apparatus
Assignee: BEIJING BOE DISPLAY TECH COPriority: May 27, 2022Filed: May 27, 2022Published: Jul 18, 2024
Est. expiryMay 27, 2042(~15.8 yrs left)· nominal 20-yr term from priority
G02F 1/133634G02F 1/133738G02F 1/133638G02F 1/133631G02F 1/1335G02F 1/13363G02F 1/133531G02F 2413/08G02F 2413/02
47
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Claims
Abstract
A liquid crystal display panel includes a first polarizer, a second polarizer arranged opposite to the first polarizer, a liquid crystal layer, a first optical compensation layer and a second optical compensation layer. Transmission axes of the first polarizer and the second polarizer are perpendicular to each other. An orthographic projection of an optical axis of the first optical compensation layer on the first polarizer is parallel to the transmission axis of the first polarizer. An optical axis of the second optical compensation layer is perpendicular to a plane where the second optical compensation layer is located. An in-plane retardation R O1 of the first optical compensation layer and an in-plane retardation R OLC of the liquid crystal layer satisfy a formula: R O1 =n 1 ×R OLC +m 1 λ 1 , in which m 1 is an integer, n 1 is in a range of ¼ to ¾, inclusive, and λ 1 is in a range of 390 nm to 780 nm, inclusive.
Claims
exact text as granted — not AI-modified1 . A liquid crystal display panel, comprising:
a first polarizer; a second polarizer arranged opposite to the first polarizer; wherein a transmission axis of the first polarizer is perpendicular to a transmission axis of the second polarizer; the first polarizer is closer to a light incident side of the liquid crystal display panel than the second polarizer; a liquid crystal layer disposed between the first polarizer and the second polarizer and including liquid crystal molecules; orthographic projections of optical axes of the liquid crystal molecules on the first polarizer are parallel to the transmission axis of the first polarizer, or are parallel to the transmission axis of the second polarizer; and a first optical compensation layer and a second optical compensation layer that are stacked between the first polarizer and the liquid crystal layer or between the liquid crystal layer and the second polarizer; wherein an orthographic projection of an optical axis of the first optical compensation layer on the first polarizer is parallel to the transmission axis of the first polarizer; an optical axis of the second optical compensation layer is perpendicular to a plane where the second optical compensation layer is located; and an in-plane retardation Ro of the first optical compensation layer and an in-plane retardation R OLC of the liquid crystal layer satisfy a following formula:
R
O
1
=
n
1
×
R
OLC
+
m
1
λ
1
;
wherein m 1 is an integer, n 1 is in a range of ¼ to ¾, inclusive and λ 1 is in a range of 390 nm to 780 nm, inclusive.
2 . The liquid crystal display panel according to claim 1 , wherein a value of n is ½.
3 . The liquid crystal display panel according to claim 1 , wherein the first optical compensation layer is an optical compensation layer with a single optical axis, and the second optical compensation layer is disposed on a side of the first optical compensation layer away from the first polarizer.
4 . The liquid crystal display panel according to claim 3 , wherein the in-plane retardation Rot of the first optical compensation layer is in a range of 105 nm to 145 nm, inclusive; and a thickness direction retardation R th1 of the first optical compensation layer is in a range of 42.5 nm to 82.5 nm, inclusive.
5 . The liquid crystal display panel according to claim 3 , wherein a thickness direction retardation R th2 of the second optical compensation layer and the in-plane retardation R OLC of the liquid crystal layer satisfy a following formula:
R
th
2
=
n
2
×
R
OLC
+
m
2
λ
2
;
wherein m 2 is an integer, n 2 is in a range of
-
6
+
π
6
π
to
-
6
-
π
6
π
,
inclusive, and λ 2 is in the range of 390 nm to 780 nm, inclusive.
6 . The liquid crystal display panel according to claim 5 , wherein a value of n 2 is
-
1
π
.
7 . The liquid crystal display panel according to claim 3 , wherein a thickness direction retardation R th2 of the second optical compensation layer is in a range of −100 nm to −60 nm, inclusive.
8 . The liquid crystal display panel according to claim 3 , wherein the first optical compensation layer is a +A compensation film layer, and the second optical compensation layer is a +C compensation film layer.
9 . The liquid crystal display panel according to claim 1 , wherein the second optical compensation layer is disposed on a side of the first optical compensation layer proximate to the first polarizer; the first optical compensation layer is an optical compensation layer with two optical axes; one of the two optical axes is a first optical axis, and a length of the first optical axis is greater than a length of another one of the two optical axes; an orthographic projection of the first optical axis on the first polarizer is parallel to the transmission axis of the first polarizer.
10 . The liquid crystal display panel according to claim 9 , wherein the in-plane retardation R O1 of the first optical compensation layer is in a range of 95 nm to 135 nm, inclusive; and a thickness direction retardation R th1 of the first optical compensation layer is in a range of −130 nm to −90 nm, inclusive.
11 . The liquid crystal display panel according to claim 9 , wherein a thickness direction retardation R th2 of the second optical compensation layer and the in-plane retardation R OLC of the liquid crystal layer satisfy a following formula:
R
th
2
=
n
3
×
R
OLC
+
m
3
λ
3
;
wherein m 3 is an integer, n 3 is in a range of
6
-
π
6
π
to
6
+
π
6
π
,
inclusive, and λ 3 is in the range of 390 nm to 780 nm, inclusive.
12 . The liquid crystal display panel according to claim 11 , wherein a value of n 3 is
1
π
.
13 . The liquid crystal display panel according to claim 9 , wherein a thickness direction retardation R th2 of the second optical compensation layer is in a range of 90 nm to 130 nm, inclusive.
14 . The liquid crystal display panel according to claim 9 , wherein the first optical compensation layer is a +B compensation film layer, and the second optical compensation layer is a −C compensation film layer.
15 . A display apparatus, comprising:
a backlight module; and the liquid crystal display panel according to claim 1 ; wherein the liquid crystal display panel is disposed on a light exit side of the backlight module.
16 . The liquid crystal display panel according to claim 1 , wherein a value of m 1 is 0.
17 . The liquid crystal display panel according to claim 4 , wherein the in-plane retardation R O1 of the first optical compensation layer is in a range of a difference between 125 nm and 15 nm to a sum of 125 nm and 15 nm, a difference between 125 nm and 10 nm to a sum of 125 nm and 10 nm, a difference between 125 nm and 5 nm to a sum of 125 nm and 5 nm, or a difference between 125 nm and 2 nm to a sum of 125 nm and 2 nm; and the thickness direction retardation R th1 of the first optical compensation layer is in a range of a difference between 62.5 nm and 15 nm to a sum of 62.5 nm and 15 nm, a difference between 62.5 nm and 10 nm to a sum of 62.5 nm and 10 nm, a difference between 62.5 nm and 5 nm to a sum of 62.5 nm and 5 nm, or a difference between 62.5 nm and 2 nm to a sum of 62.5 nm and 2 nm.
18 . The liquid crystal display panel according to claim 5 , wherein a value of m 2 is 0.
19 . The liquid crystal display panel according to claim 7 , wherein the thickness direction retardation R th2 of the second optical compensation layer is in a range of a difference between −80 nm and 15 nm to a sum of −80 nm and 15 nm, a difference between −80 nm and 10 nm to a sum of −80 nm and 10 nm, a difference between −80 nm and 5 nm to a sum of −80 nm and 5 nm, or a difference between −80 nm and 2 nm to a sum of −80 nm and 2 nm.
20 . The liquid crystal display panel according to claim 11 , wherein a value of m 3 is 0.Join the waitlist — get patent alerts
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